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-rw-r--r--platform/x11/SCsub1
-rw-r--r--platform/x11/detect_prime.cpp233
-rw-r--r--platform/x11/detect_prime.h37
-rw-r--r--platform/x11/os_x11.cpp31
4 files changed, 281 insertions, 21 deletions
diff --git a/platform/x11/SCsub b/platform/x11/SCsub
index 97d3d1b514..e302f09c88 100644
--- a/platform/x11/SCsub
+++ b/platform/x11/SCsub
@@ -13,6 +13,7 @@ common_x11 = [
"key_mapping_x11.cpp",
"joypad_linux.cpp",
"power_x11.cpp",
+ "detect_prime.cpp"
]
prog = env.add_program('#bin/godot', ['godot_x11.cpp'] + common_x11)
diff --git a/platform/x11/detect_prime.cpp b/platform/x11/detect_prime.cpp
new file mode 100644
index 0000000000..04a825fac9
--- /dev/null
+++ b/platform/x11/detect_prime.cpp
@@ -0,0 +1,233 @@
+/*************************************************************************/
+/* detect_prime.cpp */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
+
+#ifdef X11_ENABLED
+#if defined(OPENGL_ENABLED)
+
+#include "core/print_string.h"
+#include "core/ustring.h"
+
+#include <stdlib.h>
+
+#include <GL/gl.h>
+#include <GL/glx.h>
+#include <X11/Xlib.h>
+#include <X11/Xutil.h>
+
+#include <cstring>
+
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#define GLX_CONTEXT_MAJOR_VERSION_ARB 0x2091
+#define GLX_CONTEXT_MINOR_VERSION_ARB 0x2092
+
+typedef GLXContext (*GLXCREATECONTEXTATTRIBSARBPROC)(Display *, GLXFBConfig, GLXContext, Bool, const int *);
+
+struct vendor {
+ const char *glxvendor;
+ int priority;
+};
+
+vendor vendormap[] = {
+ { "Advanced Micro Devices, Inc.", 30 },
+ { "NVIDIA Corporation", 30 },
+ { "X.Org", 30 },
+ { "Intel Open Source Technology Center", 20 },
+ { "nouveau", 10 },
+ { "Mesa Project", 0 },
+ { NULL, 0 }
+};
+
+// Runs inside a child. Exiting will not quit the engine.
+void create_context() {
+ Display *x11_display = XOpenDisplay(NULL);
+ Window x11_window;
+ GLXContext glx_context;
+
+ GLXCREATECONTEXTATTRIBSARBPROC glXCreateContextAttribsARB = (GLXCREATECONTEXTATTRIBSARBPROC)glXGetProcAddress((const GLubyte *)"glXCreateContextAttribsARB");
+
+ static int visual_attribs[] = {
+ GLX_RENDER_TYPE, GLX_RGBA_BIT,
+ GLX_DRAWABLE_TYPE, GLX_WINDOW_BIT,
+ GLX_DOUBLEBUFFER, true,
+ GLX_RED_SIZE, 1,
+ GLX_GREEN_SIZE, 1,
+ GLX_BLUE_SIZE, 1,
+ GLX_DEPTH_SIZE, 24,
+ None
+ };
+
+ int fbcount;
+ GLXFBConfig fbconfig = 0;
+ XVisualInfo *vi = NULL;
+
+ XSetWindowAttributes swa;
+ swa.event_mask = StructureNotifyMask;
+ swa.border_pixel = 0;
+ unsigned long valuemask = CWBorderPixel | CWColormap | CWEventMask;
+
+ GLXFBConfig *fbc = glXChooseFBConfig(x11_display, DefaultScreen(x11_display), visual_attribs, &fbcount);
+ if (!fbc)
+ exit(1);
+
+ vi = glXGetVisualFromFBConfig(x11_display, fbc[0]);
+
+ fbconfig = fbc[0];
+
+ static int context_attribs[] = {
+ GLX_CONTEXT_MAJOR_VERSION_ARB, 3,
+ GLX_CONTEXT_MINOR_VERSION_ARB, 3,
+ GLX_CONTEXT_PROFILE_MASK_ARB, GLX_CONTEXT_CORE_PROFILE_BIT_ARB,
+ GLX_CONTEXT_FLAGS_ARB, GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB,
+ None
+ };
+
+ glx_context = glXCreateContextAttribsARB(x11_display, fbconfig, NULL, true, context_attribs);
+
+ swa.colormap = XCreateColormap(x11_display, RootWindow(x11_display, vi->screen), vi->visual, AllocNone);
+ x11_window = XCreateWindow(x11_display, RootWindow(x11_display, vi->screen), 0, 0, 10, 10, 0, vi->depth, InputOutput, vi->visual, valuemask, &swa);
+
+ if (!x11_window)
+ exit(1);
+
+ glXMakeCurrent(x11_display, x11_window, glx_context);
+ XFree(vi);
+}
+
+int detect_prime() {
+ pid_t p;
+ int priorities[2];
+ String vendors[2];
+ String renderers[2];
+
+ vendors[0] = "Unknown";
+ vendors[1] = "Unknown";
+ renderers[0] = "Unknown";
+ renderers[1] = "Unknown";
+
+ for (int i = 0; i < 2; ++i) {
+ int fdset[2];
+
+ if (pipe(fdset) == -1) {
+ print_verbose("Failed to pipe(), using default GPU");
+ return 0;
+ }
+
+ // Fork so the driver initialization can crash without taking down the engine.
+ p = fork();
+
+ if (p > 0) {
+ // Main thread
+
+ int stat_loc = 0;
+ char string[201];
+ string[200] = '\0';
+
+ close(fdset[1]);
+
+ waitpid(p, &stat_loc, 0);
+
+ if (!stat_loc) {
+ // No need to do anything complicated here. Anything less than
+ // PIPE_BUF will be delivered in one read() call.
+ read(fdset[0], string, sizeof(string) - 1);
+
+ vendors[i] = string;
+ renderers[i] = string + strlen(string) + 1;
+ }
+
+ close(fdset[0]);
+
+ } else {
+ // In child, exit() here will not quit the engine.
+
+ char string[201];
+
+ close(fdset[0]);
+
+ if (i) setenv("DRI_PRIME", "1", 1);
+ create_context();
+
+ const char *vendor = (const char *)glGetString(GL_VENDOR);
+ const char *renderer = (const char *)glGetString(GL_RENDERER);
+
+ int vendor_len = strlen(vendor) + 1;
+ int renderer_len = strlen(renderer) + 1;
+
+ if (vendor_len + renderer_len >= sizeof(string)) {
+ renderer_len = 200 - vendor_len;
+ }
+
+ memcpy(&string, vendor, vendor_len);
+ memcpy(&string[vendor_len], renderer, renderer_len);
+
+ write(fdset[1], string, vendor_len + renderer_len);
+
+ close(fdset[1]);
+ exit(0);
+ }
+ }
+
+ int preferred = 0;
+ int priority = 0;
+
+ if (vendors[0] == vendors[1]) {
+ print_verbose("Only one GPU found, using default.");
+ return 0;
+ }
+
+ for (int i = 1; i >= 0; --i) {
+ vendor *v = vendormap;
+ while (v->glxvendor) {
+ if (v->glxvendor == vendors[i]) {
+ priorities[i] = v->priority;
+
+ if (v->priority >= priority) {
+ priority = v->priority;
+ preferred = i;
+ }
+ }
+ ++v;
+ }
+ }
+
+ print_verbose("Found renderers:");
+ for (int i = 0; i < 2; ++i) {
+ print_verbose("Renderer " + itos(i) + ": " + renderers[i] + " with priority: " + itos(priorities[i]));
+ }
+
+ print_verbose("Using renderer: " + renderers[preferred]);
+ return preferred;
+}
+
+#endif
+#endif
diff --git a/platform/x11/detect_prime.h b/platform/x11/detect_prime.h
new file mode 100644
index 0000000000..13bcf6fc38
--- /dev/null
+++ b/platform/x11/detect_prime.h
@@ -0,0 +1,37 @@
+/*************************************************************************/
+/* detect_prime.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
+/* */
+/* Permission is hereby granted, free of charge, to any person obtaining */
+/* a copy of this software and associated documentation files (the */
+/* "Software"), to deal in the Software without restriction, including */
+/* without limitation the rights to use, copy, modify, merge, publish, */
+/* distribute, sublicense, and/or sell copies of the Software, and to */
+/* permit persons to whom the Software is furnished to do so, subject to */
+/* the following conditions: */
+/* */
+/* The above copyright notice and this permission notice shall be */
+/* included in all copies or substantial portions of the Software. */
+/* */
+/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
+/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
+/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
+/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
+/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
+/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
+/*************************************************************************/
+
+#ifdef X11_ENABLED
+#if defined(OPENGL_ENABLED)
+
+int detect_prime();
+
+#endif
+#endif
diff --git a/platform/x11/os_x11.cpp b/platform/x11/os_x11.cpp
index 0db79fa3e9..e0924fc982 100644
--- a/platform/x11/os_x11.cpp
+++ b/platform/x11/os_x11.cpp
@@ -29,6 +29,8 @@
/*************************************************************************/
#include "os_x11.h"
+#include "detect_prime.h"
+
#include "core/os/dir_access.h"
#include "core/print_string.h"
#include "drivers/gles2/rasterizer_gles2.h"
@@ -240,28 +242,15 @@ Error OS_X11::initialize(const VideoMode &p_desired, int p_video_driver, int p_a
// maybe contextgl wants to be in charge of creating the window
#if defined(OPENGL_ENABLED)
- // Set DRI_PRIME if not set. This means that Godot should default to a higher-power GPU if it exists.
- // Note: Due to the final '0' parameter to setenv any existing DRI_PRIME environment variables will not
- // be overwritten.
- bool enable_dri_prime = true;
- // Check if Nouveau is loaded, we don't want to force dGPU usage with that driver.
- if (FileAccess *f = FileAccess::open("/proc/modules", FileAccess::READ)) {
- // Match driver name + space
- String nouveau_str = "nouveau ";
-
- while (!f->eof_reached()) {
- String line = f->get_line();
-
- if (line.begins_with(nouveau_str)) {
- enable_dri_prime = false;
- break;
- }
+ if (getenv("DRI_PRIME") == NULL) {
+ print_verbose("Detecting GPUs, set DRI_PRIME in the environment to override GPU detection logic.");
+ int use_prime = detect_prime();
+
+ if (use_prime) {
+ print_line("Found discrete GPU, setting DRI_PRIME=1 to use it.");
+ print_line("Note: Set DRI_PRIME=0 in the environment to disable Godot from using the discrete GPU.");
+ setenv("DRI_PRIME", "1", 1);
}
- f->close();
- memdelete(f);
- }
- if (enable_dri_prime) {
- setenv("DRI_PRIME", "1", 0);
}
ContextGL_X11::ContextType opengl_api_type = ContextGL_X11::GLES_3_0_COMPATIBLE;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 00:04:03 +0000